1990s fashion has been making a comeback for a while, so it was only a matter of time before people started wearing JNCOs and trancing out under a black light again. And now there's the perfect hair trend for that: glow in the dark. The effect is produced by all sorts of dye that's actually been around for a while, as BuzzFeed reports. Pravana’s Chromasilk Neons, High Voltage by Manic Panic, temporary dye Iglow, and a UV color rinse from The Glow will all have you glowing. The effect is definitely striking, but whether or not they're designed to look good during the day is questionable: